Heritage Audio TT-73 1-Channel Class A Portable Mic-Line Preamp User Manual

Heritage Audio TT-73 1-Channel Class A Portable Mic-Line Preamp

INTRODUCTION

Thank you for choosing the Table top TT-73. Heritage Audio is dedicated to bringing you ´the sound of yesterday for tomorrow´. We specialize in capturing that unique, enticing sound that everybody has fallen in love with. For years engineers, producers and musicians have been yearning for that classic vibe. Usually the only option is to search for old, used original equipment that is almost always in a questionable state of operation. This brings with it a whole lot of other issues, making the experience less than desirable. Not to mention the very high prices asked for this equipment, which makes them virtually unobtainable for the great majority. Now it´s possible to obtain that same sound with a brand new piece that will give you all the problem- free, heavy-duty use you´ll need for years of music making history. reproduced by any means or disclosed in part or whole to any third party without written permission. Heritage Audio reserves the right to alter specifications without notice. The information in this manual has been carefully checked and is believed to be accurate at the time of publication. However, no responsibility is taken by us for inaccuracies, errors or omissions nor any liability assumed for any loss or damage resulting either directly or indirectly from use of the information contained within it.

IN THE BOX

DESCRIPTION

One Channel Class A Portable Mic/LinePreamp with D.I. Standing for TABLETOP 73, it is in essence a reformatted single channel DMA 73 with a very sturdy construction for portable use in any environment. The TT-73 widens the range of applications to on-stage use, portable systems, hotel rooms, on-site location recordings, etc. It even has its own handle to make lugging it around as easy as can be. Now musicians are able to give 73-driven line levels to FOH engineers, using the front panel DI inputs. While on the road they are able to record at the same studio quality level from hotel rooms, etc. Stage microphones can be brought up to line level without using long cable runs. These are just some of the possibilities. Special care has been taken with the internal worldwide power supply, which has been custom engineered to operate close to audio transformers with no noise induced. New to the range of tabletop units is the implementation of DI THRU jacks for simultaneous use of instrument amplifiers. A ground lift switch prevents any ground loops from introducing hum into the audio signal. The combination of wood and RAF blue gray steel makes the tabletop units aesthetically stand out in any professional recording environment and will bring your pro or semi pro facility the touch of class your customers are looking for. Also worth mentioning is the DTT-73. It is a 2 channel version, exactly the same but with twice the power. Instead of just a single channel, it’s a ´double´ TABLETOP 73. A very attractive option for those that need two inputs simultaneously.

GETTING STARTED

FRONT

INPUT GAIN SWITCH

5 dB Steps From 30 to 80

| THRU OUTPUT

To also send D.I. signal to Amp, simultaneously

| THRU GND LIFT

Disconnects the ground pin from the connector

| D.I.

Switch to activate the D.I. Input

| PHANTOM POWER

Activates 48 V

6| 7| 8| 9| 10
HIGH PASS FILTER

-3 dB at 82 Hz, Discrete Class A

| OUTPUT ATTENUATOR

Attenuates from 0 to Infinity

| D.I. INPUT

High Impedance Class A JFET

| MIC INPUT IMPEDANCE

1200 Ω or 300 Ω when pressed

| LINE

Switches from MIC/D.I. to Line

11| 12| 13| 14|
MIC PAD

20 dB Reduction Ahead of Input Transformer

| PHASE

Flips phase 180º

| +24 V LIGHT

Lights to confirm proper internal voltage in available

| +48 V LiGHT

Lights to confirm proper voltage for PHANTOM POWER is

available

REAR

POWER INPUT

To Be Connected to a standard IEC cable for powering

| ON/OFF

Switch to activate unit

| LINE OUTPUT

Male XLR Connector

| LINE INPUT

Female XLR Connector

| MIC INPUT

Female XLR Connector

APPLICATIONS

D.I.

SPECIFICATIONS

• Microphone input impedance: High=1200 Ω minimum; Low=300 Ω minimum. Higher gain positions gradually have greater impedances, optimum for low gain ribbon mics. Input is transformer balanced and floating.
• Line input impedance: 10 kΩ bridging, transformer balanced and floating.
• Output impedance: Less than 75 Ω, transformer balanced and floating, to drive a load of 600 Ω.
• D.I. input impedance: Greater than 2 MΩ, unbalanced.
• Maximum output: Greater than +26,5 dBu into 600 Ω (internally terminated).
• THD: Less than 0,025 % at 1 kHz, Less than 0,05 % at 100 Hz.
• Frequency response: 20 Hz (+0,3 dB) to 20 kHz (-0,2 dB).
• Maximum Gain: Slightly greater than 80 dB.
• Power supply: Internal no-noise PSU, accepting worldwide voltages from 100 V to 240 V.
• Dimensions (W x H x L): 238 mm x 95 mm x 250 mm.
• Weight: 3,020 Kg.

SIGNAL FLOW

TROUBLE SHOOTING

Make sure the GAIN knob is not in the ´Off´ position.
There still doesn´t appear to be any signal at all arriving at the back input XLR.| Check to see if a jack cable has been left plugged into the front panel D.I.
Even at the lowest position on the GAIN knob I still have too much gain.| When this happens you should activate the PAD button. This will reduce the input by 20 dB ahead of the input transformer.
Condenser microphones don´t seem to work with TT-73.| Make sure the red +48 V button is pressed in to activate the phantom power sent to the microphone.
There doesn´t seem to be any output at all from the unit.| Check to see if the OUTPUT knob is fully turned down as this will attenuate the signal completely.
Sending a signal to the unit from a DAW overloads it terrible.| It is necessary to press the LINE button when sending it a line level source.

If not, it is expecting a Microphone signal with a very different impedance.

I´d like to use my amp but have connected my guitar to the TT-73 to send to the FOH engineer.| Simply tap the signal from the THRU output jack.   It is identical to the signal received at the TT-73 input.
There is a ground like noise on my amp.| Try pushing the ´LIFT´ button to see if it helps.

WARRANTY STATEMENT

LIMITED 2 YEAR WARRANTY
Heritage Audio TT-73 is warranted by Heritage Audio SL to be free from defects in materials and workmanship for the period of 2 years to the original purchaser. In the event of such defects, the product will be repaired without charge or, at our option, replaced with a new one if delivered to Heritage Audio prepaid, together with a copy of the sales slip or other proof of purchase date. The warranty excludes problems due to normal wear, abuse, shipping damage or failure to use the product in accordance with the specifications. Heritage Audio shall not be liable for damages based upon inconvenience, loss of use of the product, loss of time, interrupted operation or commercial loss or any other damages, whether incidental, consequential or otherwise. This warranty is not transferable. Heritage Audio and the Heritage Audio “H” logos are registered Trademarks owned and/or licensed by Heritage Audio.

REGISTRATION

Please visit our website: https://heritageaudio.net/registration/

RECALL SHEETS

HERITAGE AUDIO. C/ Alfonso Gómez, 38, 3C. 28037 Madrid – Spain. Tel: +34 917 266 189 info@heritageaudio.com.

References

• Heritage Audio
• Heritage Audio

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