Graham Slee Novo headphone amplifier

Graham Slee Novo headphone amplifier

SKU: GSPNOVO

  • $465.00

GRAHAM SLEE NOVO HEADPHONE AMPLIFIER

Discrete design offers exceedingly high sound quality

The Graham Slee Entheos (enthusiast's) Series Novo stereo headphone amplifier is a discrete solid state transistor configuration using an IC voltage regulator. There are six transistors per channel. The "fast" voltage amplifier stage uses a current feedback input and a current source to drive a small signal transistor class AB push-pull output stage. The output is capacitive and resistively coupled to prevent headphone damage/short circuit damage and an output impedance reduction network minimizes any signal distortion these components could add. The Graham Slee Novo headphone amplifier uses multi-path negative feedback to reduce distortion without degrading the musicality of the signal.

The Graham Slee Novo headphone amp is supplied with an Energy Efficient plug style AC/DC mains adapter power supply for universal mains use: 90-250VAC supplied with a selection of plug heads to suit a customer's mains outlet. The power supply is of the switched mode type and sensitive users may detect a slight tingling sensation from the Novo case: this is normal and within world safety standards, but can be eliminated completely by connecting a wire to the Novo "aux ground" post; the other end to earth (either mains earth or an earth spike - seek qualified assistance if unsure). When connected to an earthed source this wire will not normally be required. The switched mode power supply emits an ultra-sonic whistle which cannot normally be heard, but in the presence of other persistent noise (such as air-con, refrigerators etc) a beat frequency (chirping) may be heard. Careful positioning will minimize this effect.

A Chained set of phono/RCA jacks enables the stereo input to be routed to other equipment such as a power amplifier. The input impedance is greater than 39 kilo Ohms so as to be virtually transparent to the source.

The output jack is designed for standard 1/4 inch/6.35mm headphone plugs (B-gauge) and can also be used with tapered A-gauge plugs. Headphones of impedance 8 - 2,000 Ohms may be used but best results will be obtained with impedances of 16 - 600 Ohms. An impedance reduction network reduces the driving impedance "seen" by the headphones and compensates for the headphone's cable capacitance, leading to a more focused musical image than purely resistive or power-amp configuration headphone amplifier outputs. It also reduces the apparent differences between dissimilar headphones.

The volume control can be set at any position to give comfortable listening. Unlike Hi-Fi amplifier volume controls, it can be set at any position and still give excellent performance. This is preferable to the contact resistance and wear of a gain switch, which would otherwise be required.

Graham Slee Novo Specifications

Output: 150mW rms into 32 Ohms, 40mW rms into 600 Ohms (both channels fully driven - 0.05% THD)
Input Impedance: greater than 39 kilo Ohms
Recommended input range: 200mV - 1V rms (2.8V p-p)
Frequency Response (worst case): Flat: 43Hz to 16kHz (-1dB), 22Hz to 30kHz (-3dB) (volume control at 3 o'clock position)
Channel Balance: 0.5dB typical
Hum & Noise: -80dB CCIR Q-pk 20Hz-20kHz (into 30 Ohms)
Stereo Crosstalk: -64dB typical
Distortion (THD+Noise): 0.02% at 1 kHz into 30 Ohms, and 12 o'clock volume control position
Power Supply: Switched mode type AC/DC adapter for use with 90-250VAC mains outlet
Dimensions: L. 10.5 W. 10.5 H. 5 (cm) approx. excluding controls and connectors

Specifications and features are subject to change without notice.


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New Life for Shure V15V

The Shure V15 has always been an even handed, great tracking cart. Perhaps verging on the boring, for some tastes. The JICO SAS styli retain the lush midrange, even handed presentation of the cart, but with a shot of adrenaline and perhaps a tad more revealing than the original styli. Super product!

Happy

Works a treat on my JVC quadraphonic system and despite the dreaded custom charges, it was still cheaper than modern equivalents and NOS stylus available elsewhere.

Nothing Like the Real Thing

When Shure was no longer a stylus option, and I saw JICO here n there (ahem ahem) I was suspicious, but thankfully checked the sole supplier I saw website directly, LPTunes, and got a Straight Answer ASAP to my question whether their stylus were refurbished or factory NEW, which they proved to be. Not only do my LP's play CLEARER than they did with the SHURE styluses; they actually play LOUDER! Could be Just My Imagination. Who knows?