Telefunken

TELEFUNKEN TDP-1 Direct Box

  • About TDP-1
  • Specifications
  • Gallery
  • FAQ
  • Accessories

The Telefunken TDI-1 (mono unit) and TDI-2 (dual unit) are new passive direct box designs that combine premium quality components with a rugged construction to create a reliable DI with rich, warm tone. Utilizing an OEP/Carnhill transformer made in the UK, mated with a simple "less is best" design approach, the Telefunken passive DI's provide superior vibe and character to best complement the natural tone and feel of your instrument.

The high quality audio transformer is just one of the premium design elements in the TD Series direct boxes. The PCBs are all 100% hand-assembled exclusively with through-hole components to provide a much more secure and reliable connection compared to common surface-mount technology. All circuit traces are gold-plated for maximum conductivity over the life of the product. High input impedance prevents the loading down of passive pickups. The frequency response of the circuit is ± 2dB from 10 Hz to 40 kHz, with extremely low distortion and self-noise figures.

The circuit is housed in an extremely durable extruded aluminum enclosure with recessed switches and connectors. This rugged construction is virtually indestructible, able to easily withstand the wear and tear of gigging. Each channel features two heavy duty metal toggle switches to engage a -15 dB pad and ground lift. The TDP-2 unit features two independent DI channels with separate controls, giving you the ability to run two instruments through one footprint on stage or in the studio.

The Telefunken passive DI design is your new go-to reliable, high quality direct box. The simple and elegant design approach yields a harmonically rich low-end with a detailed and open high end that delivers a new standard in reliability and performance for direct boxes.

Key features:

  • OEP/Carnhill transformer, made in the UK
  • -15 dB pad switch
  • Ground lift switch
  • Rugged aluminum construction
  • Recessed switches and connectors for protection
  • 100% through-hole components
  • Amphenol connectors
  • WIMA and Nichicon capacitors
  • 1% 1/4W metal film resistors
  • 3-year warranty

Please contact your favorite TELEFUNKEN Elektroakustik reseller to demo or purchase the TDP-1. For reseller referrals, please feel free to email: info@t-funk.com.

TELEFUNKEN Factory Service - TELEFUNKEN offers restoration services for all TELEFUNKEN microphones. We do not sell any internal microphone housings or capsules without factory service performed in-house. Call TELEFUNKEN Elektroakustik for a return authorization number and to discuss work needed on your microphone system.

Please call 860-882-5919 for more information.

Channels1
TransformerCustom-Wound OEP/Carnhill
Frequency Range10 Hz - 40 kHz, ± 2 dB
Noise
Input Impedance> 100 kΩ
Output Impedance> 100 kΩ
Power Requirement
Current Draw
Weight482 g (1.06 lb)
Dimensions100 mm L x 100 mm W x 50 mm H
Max Input>+18dBV
Input Connection1/4" Jack
Output ConnectionXLR Output, 1/4" Thru

           

           

        

GENERAL

What is a direct box used for?
A direct box is a device for matching high impedance instrument outputs to low impedance microphone inputs. A direct boxes is commonly referred to as a DI, which stands for "direct insert" or "direct inject".

What is the difference between a passive and active direct box?
Generally speaking, passive direct boxes convert the signal using a transformer and do not require any power, which is the case for the TELEFUNKEN TD-1 and TD-2. Active direct boxes range in features and design, but typically have a small gain stage that requires power from either an external source or internal battery. For example, the TDA-1 and TDA-2 are powered by +48 VDC phantom power.

What are the sonic differences between the TELEFUNKEN passive and active direct boxes?
Both designs are based around a high quality, large format nickel-iron core transformer, which imparts a natural saturation and tonal character. The passive DI will give you an extended low frequency response from 10 Hz to 40 kHz (± 2 dB). When pushing the input signal a little harder, it will give you more of that "old school" harmonically rich saturation, with just enough color and vibe to complement the natural sound of your instrument. The active DI can be characterized as cleaner with less distortion compared to the passive. It also offers higher headroom performance and an extended frequency response from 20 Hz to 70 kHz (± 2 dB). The active circuit combines the transformer's saturation qualities with a more open response.

Does the TELEFUNKEN direct box add gain to my instrument?
No. While some preamplifiers have a DI input with gain attenuation, standard direct boxes typically do not add gain to your instrument. The TD-1 and TD-2 are passive DI's, which by nature yields a -10 dB insertion loss. The TDA-1 and TDA-2 active DI's are a unity gain device.

Do direct boxes need power?
Passive DI's do not require a power source to operate. Active DI's require some form of power. The TELEFUNKEN TDA-1 and TDA-2 active direct boxes operate off of standard +48 VDC phantom power, as many other active DI's do. Other products may require an external power supply or battery to operate.

FEATURES

When should I use the ground lift switch?
You should only use the ground lift if you are experiencing unwanted hum or buzz. The ground lift switch interrupts the ground loops between equipment, preventing current flow along the cable shield between two devices. The ground lift switch is engaged when it is in the up position, labeled with the word 'LIFT' on the panel.

What is the THRU jack for?
The THRU jack acts as a split of your input signal. This is used by connecting your instrument to the IN jack, and running a cable from the THRU jack to your amplifier input. The XLR signal then runs directly to the console or interface.

When should I use the pad switch?
In the up position, the pad switch engages a -15 dB pad on the input signal coming into the DI. You should only use this if you hear any unwanted distortion in your signal, or you do not have the option to pad the input to your preamplifier and have too much signal coming in. Both DI designs have very high clean headroom, so distortion is very unlikely even with the hottest output devices.

What are the featured components in these direct box designs?
All TELEFUNKEN DI's feature high quality custom-wound OEP/Carnhill transformers made in the UK. All components are through-hole and hand assembled; no surface mount connections. High-quality audio grade capacitors by Nichicon and WIMA contribute to the tonal quality. Heavy-duty metal switches and metal connectors reinforce the build's durability. The active designs feature individually hand-tuned circuits for minimal distortion.

RECOMMENDATIONS

What DI would you recommend for bass?
A good rule of thumb is selecting a direct box that is opposite your pickup type. If you have a bass with passive pickups, the TDA-1 active DI is suggested. If you have a bass with active pickups, the TD-1 passive DI is recommended. Of course all combinations will work, and ultimately comes down to personal preference.

What DI would you recommend for keyboards and synthesizers?
Since most keyboards and synths have a relatively high output level, they often pair best with the passive direct box. For a mono synthesizer or keyboard, the TD-1 passive DI is recommended. For stereo output keyboards, the TD-2 is recommended.

What DI would you recommend for an acoustic guitar output?
Similar to bass, a good rule of thumb is selecting a direct box that is opposite your pickup type. If you have an active, battery powered preamplifier on your acoustic, we recommend using the TD-1 passive DI. If you are using a lower output passive pickup, we recommend the TDA-1 active DI. Again, all combinations will perform well, and will come down to personal preference.

FUNCTION

What's the difference between a 'dual' unit and a 'stereo' unit? Can the TD-2 and TDA-2 be used for a stereo instrument?
Yes. We use the term 'dual' for our DI's with two channels because they feature two completely independent channels, meaning it can be used for 2 independent instrument sources with no crosstalk. They can certainly be used for a left and right feed from a stereo instrument. Note that each channel's pad and ground lift work independently, so make sure to engage both channels when performing either function with a stereo device.

Can I use one mono source with the TD-2 or TDA-2 dual DI?
Yes, the two channels are completely independent, so both do not need to be used.

Can I use a TD-2 or TDA-2 dual DI with two instruments?
Yes, the two signal paths are completely isolated. This means the TD-2 and TDA-2 can be used with stereo instruments or two completely different sources with no crosstalk.

How will I know when the active DI has power?
A blue LED will light up on the output panel of the direct box, indicating it is receiving +48V phantom power. Note that when the active DI is not powered but has the output connected, an extremely low level signal will pass through the circuit.

My TDA-1/TDA-2 is not working, is it broken? Do I have to put a battery in it?
The TDA DI's require phantom power (+48 VDC) sent to it from your recording interface or console. When the unit is receiving power, you will see a blue LED. Neither unit has an internal battery compartment.

Can I plug an amplifier output into a TELEFUNKEN DI?
No, all four DI's are designed for instrument input only.

Can I use the passive DI for re-amping?
Though it will pass signal, we strongly suggest using a reamp box, which will ensure that your guitar amp sees correct levels and impedance.

Can I use the active DI for re-amping?
No! You can cause permanent damage to the unit.

Accessories for the    include:

M 970AR

Power Supply for AR-70 Stereo

$649.00

M 970

Power Supply for ELA M 270

$599.00

M 960

Power Supply for ELA M 260

$449.00

M 950

Power Supply for ELA M 250/251

$599.00

M 950S

Dual Power Supply for (2) ELA M 250/251

$649.00

M 950E

Power Supply for ELA M 250E/251E

$599.00

M 950ES

Dual Power Supply for (2) ELA M 250E/251E

$649.00

M 940

Power Supply for U47 or U48 with VF14 or VF14K

$599.00

M 940S

Dual Power Supply for (2) U47/U48 with VF14 or VF14K

$649.00

M 924

Power Supply for C24 with (2) Polar Pattern Switches

$599.00

Photo Coming Soon

M 910

Power Supply for C12 with Polar Pattern Switch

$599.00

M 910S

Dual Power Supply for (2) C12 with (2) Polar Pattern Switches

$699.00

M 901S

Dual Power Supply for (2) AK-47 MkII, AR-51 or M16 MkII with (2) Polar Pattern Switches

$699.00

M 901

Power Supply for AK-47 MkII, AR-51 or M16 MkII with Polar Pattern Switch

$179.00

M 960S

Dual Power Supply for (2) ELA M 260 or CU-29

$649.00

M 900

Power Supply for CU-29

$149.00

M 870

25' Accusound CX-7 Quad-Shielded Cable with Microphone Stand-Mount Swivel Connector for ELA M 270

$799.00

M 850

25' Accusound CX-7 Quad-Shielded Cable with Microphone Stand-Mount Swivel Connector for ELA M 250/251

$799.00

M 840

25' Accusound CX-7 Quad-Shielded Cable with Microphone Stand-Mount Swivel Connector for U47/U48

$799.00

M 810

25' Accusound CX-7 Quad-Shielded Cable with Microphone Stand-Mount Swivel Connector for C12

$799.00

FC50

Combination locking flight case fits ELA M 250/251

$299.00

FC40S

Combination locking flight case fits U47/U48 STUDIO or STEREO set (2 mics, wooden boxes & cables, 1 psu)

$399.00

FC40

Combination locking flight case fits U47 or U48

$299.00

FC10

Combination locking flight case fits C12

$299.00

FC01

R-F-T series flight case fits AR-51, AK-47, ELA M 260, CU-29

$149.00

WB70

Microphone Oak Wood Box with Diamond Logo for ELA M 270

$199.00

WB60

Microphone Wooden Box with Diamond Logo for ELA M 260, C60, C61, KM84, or Other Small Diaphragm Microphones

$49.00

WB50

Microphone Oak Wood Box with Diamond Logo for ELA M 250/251 or ELA M 250E/251E

$199.00

WB40

Microphone Oak Wood Box with Diamond Logo for U47/U48 Long Body

$199.00

WB01

Microphone Wooden Box with Diamond Logo for AK-47 MkII, AR-51, M16 MkII

$99.00

WB00

Microphone Wooden Box with Diamond Logo for CU-29

$89.00

WB10

Microphone Oak Wood Box with Diamond Logo for C12 or C24

$199.00

M 760

Elastic Shockmount for ELA M 260 [20 mm Dia. Microphone Body]

$69.00

M 750

Clasping Shockmount for ELA M 250/251, ELA M 250E/251E or ELA M 270 [54 mm Dia. Microphone Body]

$99.00

M 740

Clasping Shockmount for U47/U48 [64 mm Dia. Microphone Body]

$99.00

M 710

Clasping Shockmount for C12, C24 [46 mm Dia. Microphone Body]

$99.00

M 701

Clamping Shockmount for AK-47 MkII, AR-51 or AR-70 [41 mm Dia. Microphone Body]

$99.00

M 700

Base Threaded Shockmount for CU-29

$99.00

M 780

Microphone Clip for M80

$20.00

WB70AR

Microphone Wooden Box with Diamond Logo for AR-70

$199.00

FC70

Combination locking flight case fits ELA M 270

$349.00

FC50S

Combination locking flight case fits ELA M 250/251 STEREO SETS

$299.00

M 963

3 Channel Power Supply for ELA M 260 / CU-29

$999.00

M960FS

Dual Battery Power Supply for ELA M 260 Field Set

$599.00

M 850E

25' Accusound CX-7 Quad-Shielded Cable with Microphone Stand-Mount Swivel Connector for ELA M 250E/251E

$799.00

M 801

25' Accusound TX-7 Dual-Shielded Cable with Neutrik 7-Pin XLR Connectors for all R-F-T Series Microphones

$169.00

FC60T

Combination locking flight case fits ELA M 260 TRI-MONO SETS

$299.00

FC60S

Combination locking flight case fits ELA M 260 STEREO SETS

$299.00

FC10S

Combination locking flight case fits C12 & R-F-T STEREO SETS

$299.00

M 901A

Power Supply Upgrade for AK-47 MkII, AR-51, or M16 MkII

$599.00

M 840T

25' Accusound CX-7 Quad-Shielded Cable with Tuchel Connector for U47/U48

$499.00

FC99

NANUK brand hard shell plastic case; virtually indestructible, lightweight, watertight cases

$349.00

M 782

M82 Kick Drum Microphone Mount

$19.00

M 784

Metal Drum Microphone Mount

$11.00

M 785

Plastic Drum Microphone Mount

$9.00

SGMC-10-XLR

10 meter (32.8 feet) XLR cable TELEFUNKEN Elektroakustik's Stage Series Microphone Cable has been engineered for use on live sound stages and in recording studios. Featuring cable made from 100% Copper wire, the SGMC-10 is a 10 meter (32.8 foot) XLR cable featuring straight male and female connectors and is ideal for use on all audio applications.

$38.00

STMC-10-XLR

Premium 10 meter (32.8 feet) XLR cable made in the USA TELEFUNKEN Elektroakustik's Studio Series Microphone Cable has been designed to achieve the perfect sonic transmission of sound signals for all critical studio and stage applications. Made in the USA by Accusound, the STMC-10 is a 10 meter (32.8 foot) XLR cable featuring high-strand count quad oxygen free copper conductors sealed in an audiophile-grade, low loss polyethylene insulator. A copper braid shield is added for additional RFI and EMI noise rejection, resulting in a premium audio cable offering sonic accuracy and clarity, as well as the legendary tone TELEFUNKEN products are known for.

$75.00

SGMC-5R-XLR

5 meter (16.4 feet) XLR cable with right angle female XLR connector

$20.00

M785

Plastic Drum Microphone Mount

$9.00

M784

Metal Drum Microphone Mount

$11.00

FC61

M60 FET system flight case for M60, M61 & M60 FET microphones. Zipper case for small diaphragm condenser microphones. Includes compartment for one microphone, one cable, one elastic mic mount and 3 capsule containers.

$49.00

FC62

M60 FET STEREO SET flight case for M60, M61 & M60 FET microphones. Zipper case for small diaphragm condenser microphones. Includes compartment for two microphones, two cables, two elastic mic mounts and 6 capsule containers.

$69.00

TK62

TK62 Hypercardioid Capsule The TELEFUNKEN TK62 is a small diaphragm hyper-cardioid capsule used with the ELA M 260 tube microphone and the M60 FET microphone. Featuring a 6-micron gold-sputtered membrane measuring 15mm in diameter, the TK62 provides a wide cardioid pattern flat in response from 150 Hz to 3 kHz, with a dip at 6 kHz and a smooth, airy presence peak at 8 kHz. These small diaphragm capsules are tested to a strict ±1dB sensitivity tolerance. This tightened polar pattern is great for use on cymbals, percussion, and as a stereo pair for live performance recording, as used in the ELA M 260 Field Set.

$185.00

TK61

TK61 Omni Capsule The TELEFUNKEN TK61 is a small diaphragm omnidirectional capsule used with the ELA M 260 tube microphone and the M60 FET microphone. Featuring a 6-micron gold-sputtered membrane measuring 15mm in diameter, the TK61 offers a large, open sound perfect for capturing the subtle nuances and space of your recording environment. The frequency response is flat from 20 Hz to 5 kHz, with a smooth, airy presence peak at 8 kHz. These small diaphragm capsules are tested to a strict ±1dB sensitivity tolerance. When used with the diffuse field spheres in the ELA M 260 Tri-Mono system, the TK61 omnidirectional capsule captures the ambience and vibe of your room to breathe life into any recording.

$175.00

TK60

The TELEFUNKEN TK60 is a small diaphragm cardioid capsule used with the ELA M 260 tube microphone and the M60 FET microphone. Featuring a 6-micron gold-sputtered membrane measuring 15mm in diameter, the TK60 has a surprisingly full low end for a small diaphragm capsule, and offers a quick and accurate transient response. These small diaphragm capsules are tested to a strict ±1dB sensitivity tolerance. The frequency response is flat from 150 Hz to 7 kHz, with a smooth, airy presence peak at 8 kHz making it ideal for drum overheads, acoustic guitar, and other acoustic instruments.

$165.00

M 761

Elastic Shock mount 20 mm Dia. Microphone Body

$69.00

M80 Head Grill

Replacement head grills for M80, available in multiple colors.

$25.00

M81 Head Grill

Replacement head grills for M81, available in multiple colors.

$25.00

HEAD-002PL04

Replacement head grill for the CU-29 Copperhead microphone, finished in antique copper plating.

$99.00

HEAD-002PL03

Replacement head grill for the AR-51 microphone, finished in Black Chrome / Tri-Chrome.

$99.00

HEAD-001

Replacement head grill for the AK-47 mkII microphone, finished in chrome.

$99.00

GE 5654W

GE 5654W replacement vacuum tube for use in the TELEFUNKEN CU-29 microphones

$20.00

GE ECC81

GE ECC81 replacement vacuum tube for use in the TELEFUNKEN AR-51 and AR-70 STEREO microphones

$30.00

Phillips Raytheon 5840

5840 replacement vacuum tube for the TELEFUNKEN AK-47mkII and ELA M 260 microphones

$20.00

GE JAN 6072A

GE JAN 6072a replacement vacuum tube for use in the TELEFUNKEN ELA M 251E and C12 microphones

$99.00

VF14K

VF14K Vacuum Tube for use in the TELEFUNKEN or NEUMANN U47 or U48 microphones

$750.00

National 12AT7WA

National rebranded tubes, mainly from the Mullard and Raytheon factories. The "WA" designation means that this VHF [Very High Frequency] dual triode is a select version that is deemed acceptable for military applications.

$20.00

FC80

Hard shell plastic flight case with space for 1x M82 and 4x M80-SH or M81-SH microphones and hardware mounts.

$149.00

HC00

Hard shell flight case for the CU-29 Copperhead tube microphone system. Virtually indestructible, TELEFUNKEN Elektroakustik's new rugged hard case has innovative features for unmatched strength and durability. It is o-ring sealed and waterproof up to a depth of 3 feet. It's airtight, and built to withstand the most extreme conditions. These cases are great for airline travel with an automatic pressure equalization valve. They include spring release latches lock in place as well as lock holders which are great for use with pad locks for added security. Inside the cases customized foam offers an extremely tailored, custom fit for the CU-29 microphone system.

$149.00

HC01

Hard shell flight case for the AR-51, AK-47mkII and M16mkII tube microphone systems. Virtually indestructible, TELEFUNKEN Elektroakustik's new rugged hard case has innovative features for unmatched strength and durability. It is o-ring sealed and waterproof up to a depth of 3 feet. It's airtight, and built to withstand the most extreme conditions. These cases are great for airline travel with an automatic pressure equalization valve. They include spring release latches lock in place as well as lock holders which are great for use with pad locks for added security. Inside the cases customized foam offers an extremely tailored, custom fit for the CU-29 microphone system.

$149.00

HC60

Hard shell flight case for the ELA M 260 tube microphone system. Virtually indestructible, TELEFUNKEN Elektroakustik's new rugged hard case has innovative features for unmatched strength and durability. It is o-ring sealed and waterproof up to a depth of 3 feet. It's airtight, and built to withstand the most extreme conditions. These cases are great for airline travel with an automatic pressure equalization valve. They include spring release latches lock in place as well as lock holders which are great for use with pad locks for added security. Inside the cases customized foam offers an extremely tailored, custom fit for the CU-29 microphone system.

$149.00

STMC-3X

Premium 3' XLR cable made in the USA. TELEFUNKEN Elektroakustik's Studio Series Microphone Cable has been designed to achieve the perfect sonic transmission of sound signals for all critical studio and stage applications.

$36.00

STMC-10X

Premium 10' XLR cable made in the USA. TELEFUNKEN Elektroakustik's Studio Series Microphone Cable has been designed to achieve the perfect sonic transmission of sound signals for all critical studio and stage applications.

$46.00

STMC-15X

Premium 15' XLR cable made in the USA. TELEFUNKEN Elektroakustik's Studio Series Microphone Cable has been designed to achieve the perfect sonic transmission of sound signals for all critical studio and stage applications.

$59.00

STMC-30X

Premium 30' XLR cable made in the USA. TELEFUNKEN Elektroakustik's Studio Series Microphone Cable has been designed to achieve the perfect sonic transmission of sound signals for all critical studio and stage applications.

$75.00

HC85

Hard shell plastic flight case with space for 1x M82 and 4x M80-SH or M81-SH microphones and hardware mounts.

$149.00

HC87

Hard shell plastic flight case with space for 1x M82 and 4x M80-SH or M81-SH microphones and hardware mounts.

$149.00

Cloth Stash Bag

Pull-Tie Cloth Stash Bag with TELEFUNKEN diamond logo. Fits perfectly over your tube microphone or headphones. Made from flannel.

$8.00






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