PM1A Microphone Preamp/ DI
The TUBE-TECH PM 1A is a combined Microphone Preamplifier and Direct Instrument amplifier.
The input provides a switchable +48 V phantom power, a select-able mic. impedance of 600/1200/2400 Ohm, a phase reverse switch, a low-cut filter (20 Hz/40 Hz/off), as well as a switchable
-20 dB pad. Gain is adjustable from +10 dB to +70 dB.
The Direct Instrument Input are unbalanced with a gain ranging from + 10 dB to + 60 dB. The amplifier is all tube. Input transformer is enclosed in a MU-metal can. Input and output transformers come with a static screen between the primary and secondary wirings. The input and output are balanced as well as fully floating.
Product Features
- All tube-based push-pull amplifier
- Mic. Gain in 2 dB and 10 dB steps
- Selectable mic. impedance 600/1200/2400 Ohms
- Phantom Power (+48V)
- Phase reversal
- 20 dB pad
- High impedance Direct Input
- Lowcut filter (20 Hz/40 Hz/off)
- Frequency Response @ -3 dB: 15 Hz to 60 kHz
- Typical noise figure: 5 dB @ 200 ohm
Specifications
- Impedance
Input, Mic. Preamp: >600/1200/2400 Ohm
Input, DI: 1 Mohm/82pF
Output: < 60 ohm - Frequency response @ -3 dB: 5 Hz to 60 kHz
- Distortion THD+N @ 40 Hz
0 dBu: < 0.20 %
+10 dBu: < 0.20 % - Noise Rg=200 ohm
Output Gain @ 20 dB 60 dB
22 Hz-22 kHz: < -82 dBu < -60 dBu
CCIR-468-4: < -72 dBu < -50 dBu - CMRR @ 10 kHz: < -60 dB
- Max. output @ 1 % THD+N: > +26 dBu
- Gain
Mic. Preamp: -10 dB to 70 dB
DI: 0 dB to 60 dB - Tubes
ECC 82 1 pcs
ECC 83 2 pcs - Dimensions
Height:3 units 176 mm 6.93"
Width: 50 mm 1.97"
Depth: 220 mm 8.86" - Weight
Net: 1.0 kg 2.2 lbs.
Shipping: 1.6 kg 352 lbs. - Power requirements
15 W