Country of Manufacture:United Kingdom
Release dates:1955 - 1958
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 3 dB): 7½ ips: 50Hz to 12kHz
Wow and Flutter:
Signal-to-Noise Ratio:better than 40dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The SP2 was a portable, half-track mono machine first released in July, 1955 and manufactured by Simon Sound Services of Portman Square, London.
The deck was powered by three specially designed Collaro motors and had two playing speeds, 3¾ and 7½ ips. Reels of up to 7 inches could be accommodated.
The output from the internal amplifier was 10 watts from a pair of EL84s and this was delivered to a front-mounted 10-inch speaker or an external speaker. A straight-through amplifier switch allowed the recorder to be used as a public address system.
Total harmonic distortion: 4% at 10 watts (fully modulated tape at 1kHz) / Bias frequency: 55 kHz / Valve complement: EF86, ECC83, ECC81, EL84 x 4 & EZ81 / Rewind speed: 1 minute for 1200ft / Audio output power: 10 watts / Inputs: Mic: 1 Mohm unbalanced, sensitivity (record) 1.5mV Radio input: 0.5 Mgohm unbalanced, sensitivity (rec) / Outputs: headphones or external 15 ohm speaker / Speaker(s): 10″ round, 3 ohms / Weight: 50 lbs (22.7 kg) / half-track mono