Boulder 508 Phono Stage Specifications:
Inputs
1 pair balanced, converts to unbalanced
Outputs
1 pair balanced
Input Impedance, Maximum
MC: maximum 1000 ohms, MM: 47k ohms
Output Impedance
100 ohms, balanced
1 kHz Gain, RIAA
MC: 70 dB, MM: 44 dB
Frequency Response, RIAA
±0.5 dB, 20 Hz to 20 kHz
Distortion, THD
0.01%
Noise (EIN), MC
116 nanovolts flat, 20 Hz to 20 kHz
Maximum Output Level
16 Vrms
Crosstalk, L to R or R to L
>100 dB or better 20 Hz to 20 kHz
Weight
12 lbs. (5.4 kg)
Power Requirements
100, 120, 200-240 VAC, 50-60 Hz
Power Consumption
15W maximum
Please find reviews below:
http://boulderamp.com/products/508-phono-preamplifier/
Boulder 508 Phonoo Stage Review by Michael Fremer ” STEREOPHILE ” Magazine, November 2019
Complete review HERE
BOULDER 508 Phono-Stage review by ” HiFi Plus ” Magazine , April 2019
https://www.hifiplus.com/articles/boulder-model-508-phono-preamplifier/
Boulder 508 Phono Stage review in “SoundStage Hi-Fi” Magazine, February 2019
https://www.soundstagehifi.com/index.php/equipment-reviews/1255-boulder-amplifiers-508-phono-stage
BOULDER 508 Phono Stage review by ” TONE Audio ” Magazine Review, 2018. Exceptional Value Award!
Complete review Here