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 aggiornato:21/04/2018 


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PREAMPLIFICATORI

Offerta numero: 4869 Tipo: Offerta di apparecchio usato, hi-fi usato
Listino:  Vendita: €590
 
AUDIO RESERCH
Mod.SP-4
Description

The SP-4 preamplifier was designed around the Analog Module which acts as a 'super tube' because it takes the best qualities we see in the vacuum tube much closer to the theoretical ideal.

The SP-4 surpasses our vacuum tube preamplifier in the most important areas. It has increased musical depth and definition with a smoothness that will satisfy any vacuum tube enthusiast.

Specifications

Frequency response: 5Hz to 100kHz

Total harmonic distortion: 0.005%

Gain: 36dB (MM), 24dB (line)

Signal to noise ratio: 84dB (MM), 95dB (line)

Output: 2V (Pre out), 10V (Pre out Max)

Dimensions: 480 x 210 x 89mm

Weight: 5.5kg

Accessories: walnut veneered oiled finish cabinet

Year: 1976



Frequency response
Head amp (optional): 5 Hz to 100 kHz (-3 dB)
Magnetic phono: +/- 0.5 dB of RIAA, 20 Hz to 20 kHz
High level: 1 Hz to 100 kHz (-3 dB)

Distortion (THD)
Harmonic distortion: Less than 0.005% 2 V RMS output (IHF load, with optional head amp or phono input)
Intermodulation distortion: Less than 0.005% 2 V RMS output (IHF load, SMPTE method, with optional head amp or phono input)
THD and IMD decreases with decreasing output

Noise e hum
Head amp (optional): less than 50 nV equivalent input noise with 10 ohms input (RIAA weighted)
Magnetic phono: less than 0.5 µV equivalent input noise with 1k ohms input (RIAA weighted). Typically 84 dB below 10 mV @ 1 kHz
High level: less than 2 µV equivalent input noise with shorted input and max. gain (20 Hz to 20 kHz). Typically 95 dB below rated output

Gain
Head amp (optional): 26 dB
Magnetic phono: 36 dB
High level: 24 dB (IHF load)
Input impedance
Head amp (optional): 10 ohms
Magnetic phono: 47k ohms (50 pF min.)
High level: 50k ohms (nominal)
Other values may be substituted. Head amp (optional) adjustable up to 100 ohms. Magnetic phono adjustable up to 100k ohms.
Output impedance
Less than 50 ohms
Output polarity
Maximum inputs
Head amp (optional): 5 mV RMS 1 kHz
Magnetic phono: 150 mV RMS 1 kHz
Rated outputs
Maximum 10 V RMS (all outputs, IHF load)
Power supplies
Power requirements
20/240 VAC, 50/60 Hz, 25 watts
Other
Dimensions
48x21x8.9 cm (rack mount front panel)
Weight
12 lbs. (5.5 kg) Net, 15 lbs. (7 kg) Shipping

Listino:  Vendita: €590

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