P 7 Preamplifier
The P 7 is a purist-design single-stage tube preamplifier, constructed in complete dual-mono. The shortest signal paths and best possible channel separation can be realised through this circuit concept. A very complex power supply with a tube rectifier and a RCLC filter ensure the best working conditions for the audio section. The P 7 has 4 inputs and one tape loop. With the gain switch, the amplification can be modified in 3 steps and hence adjusted to almost all situations. The negative feedback switch allows variation of amplification level as well as basic sound characteristics within certain parameters.
Each channel employs one EZ90 rectifier tube and one ECC 803S tube in the high level section.
The standard version is equipped with the star galaxy granite with gold-plated knobs. Other designs are available on request at extra charge.
- Frequency response: 10 Hz – 79 kHz (-3 dB)
- S/N ratio, weighted: 106 dB
- S/N ratio, unweighted: 98 dB
- THD+N: 0.046%
- IMD: 0.059%
- Channel separation (10 kHz): 63 dB
- Input sensitivity / Impedance: 142mV / 100 kOhm
- Output voltage (max) / Impedance: 22 V / 857 Ohm
- Amplification factor: 3, 5, 7 depends on gain switch
- Review of Audio Exklusiv P 7 tube preamplifier and P 1 hybrid power amplifier done by Hi Fi Intensive Magazine in Germany
(Review of Audio Exklusiv P 7 tube preamplifier done by LP Magazine in Germany)
The magazine LP has engaged intensively with our “first born”. They got from us for the test a P 7 in an exceptional version in Carrara marble with black lettering and mat black operating knobs (extra charge 400.-€).
Thomas Schmidt occupied himself intensively with the product with the following results: “…the workingup quality and the used components of the Audio Exklusiv P 7 are absolutely exemplary. This starts with the high-class and clean built circuit board with its thick copper coating and ends with the extensive resonance damping of the unit.”
He certifies the P 7 highest neutrality: “….we haven’t had in our rooms for a long time an electronical device which played so unexcited, incorruptible and neutral as the P 7 did… unbestechlich und neutral wie der P7 hat in unseren Ho”rra”umen schon lange keine Elektronik mehr gespielt….independently from the construction”.
Besides excellent measuring values and a brilliant space it is “…fast and precise in every pitch, without having any breeze of “airy” clouding which often leads to an early “AHA-effect” when listening a classical tube preamplifier, but after 15 minutes at the latest this effect will extremely annoy. So the P 7 is untypical for a tube – it is setting the reproduction absolutely to the point and won’t be impressed by any complex or dynamic music direction!
His summary: “The P 7 is well equipped, excellently worked out and absolutely clever composed – a preamplifier how it should be, never mind if transistor or tube.