Heed Audio Quasar MM and MC Phono Stage

£770.00

The signal processing of pick-up cartridges is one of the most delicate jobs in amplification. With this thousandfold amplification (60 dB) the signal must be processed as possible. The extremely low signal level and the frequency-related amplification which arises from the RIAA equalisation curve applied in the cutting of LPs make the highest demands of a phono preamplifier.

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Description

The signal processing of pick-up cartridges is one of the most delicate jobs in amplification. With this thousandfold amplification (60 dB) the signal must be processed as possible. The extremely low signal level and the frequency-related amplification which arises from the RIAA equalisation curve applied in the cutting of LPs make the highest demands of a phono preamplifier.

The QUASAR is built in dual-mono configuration from the power supply upwards. There are two separate amplifier stages, one for MM cartridges and the other for MC cartridges, both are fed from their own section of the regulated power supply.
The MC input section of the Quasar can be optimised for a range of cartridges, settings for both sensitivity and load are adjusted via jumpers on the main PCB.

The two separate outputs with different sensitivities make it possible for preamps or recorders to be fed via the ‘Low Out’, whilst the ‘High Out’ can drive power amps directly.

The output stage has huge headroom at extremely low noise levels and, due to its low output impedance and high current delivery, can drive long interconnect cables without any sonic degradation.

The enhanced power supply of the QUASAR is based around a 60 VA toroidal transformer with a low-density magnetic field and very little dispersion. This power, together with 40,000 ?F filtering, can feed the circuit with the kind of super-clean current usually delivered only by battery-based supplies, even with extreme dynamic swings.

The entirely discrete construction, as well as the short signal paths of the QUASAR, combine the best audiophile tradition with innovative circuit design. This phono preamplifier makes analogue high-end reproduction affordable at last!

Quasar is supplied with the fantastic Q-PSU power supply as standard.

Spec

Input sensitivity (MM):
Input sensitivity (MC):
Input impedance (MM):
Input impedance (MC):
Output level / impedance:
Frequency response (+0, -1dB):
RIAA accuracy:
Signal to noise ratio (A-weighted):
Channel separation:
Headroom:
Dimensions (WxHxD):
2.5mV
100 / 200 / 600µV (variable)
47kΩ (MM), 470Ω (MC)
100 / 470 / 1kΩ (variable)
500mV / 100Ω
3 Hz – 150 kHz
0.3dB in whole range
85dB (MM), 78dB (MC)
>65dB
24dB (MM), 22dB (MC)
9.5 x 7.2 x 25cm

Additional information

Weight 0.5 kg

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