Category:Super High Fidelity
Country of Manufacture:Japan
Release dates:1974 - 1978
Speeds: 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 4
Dimension: 17.7 x 21.6 x 10" - 450 x 550 x 255 mm
Head Composition: Permalloy
Head Configuration: Stereo - Stacked
# Motors: 3
Voltage(s): 100v Japan, 110-120v, 220-240v, Multi
Outputs: RCA, DIN
Frequency Response:7.5 ips 30-18,000 Hz, - 15 ips 30-22,000 Hz, ± 2 dB
Wow and Flutter:7 1⁄2 ips ± 0.025 % - 15 ips ± 0.02 %
Sound quality rating:8 / 10
Long-term reliability rating: 8/ 10
Weight: 61.7 Lbs. - 28 kg
Manufactured by Nippon Columbia, this professional machine was offered in two similar variations Denon DH-710F & DH-710 S
The 2 Preamps (record/playback electronics) are separate from the transport, bearing some similarity to the Teac A-7300 variations.
A half track recorder with a quarter track playback head, this machine was very versatile. The 710s was the chosen machine for the legendary audio designer, Tim De Paravicini and was very common in Japanese radio stations and recording studios. A remarkable achievement for a company that produced relatively few R-R models.
A stranger to the North American market, it appears that the 710’s were only available in Japan and priced at ¥348,000 in 1974.
Direct drive two-capstan system
The direct drive capstan motor uses the same servo system as the DENON DN-302F (commercial turntable) DP-3000, using a magnetic recording and playback method for speed detection. The two-capstan drive system uses a subcapstan connected to the motor shaft by a belt. This makes it extremely stable against variations in tape tension and load fluctuations during start-up.
In addition, the distance between the two capstans is shortened so that modulation noise caused by longitudinal vibration of the tape is greatly reduced.
Heads (4) 1/2 Track Record, Playback & Erase – 1/4 Track Playback
Motors (3) 1 x AC-Servo Capstan, 2 x 6 Pole AC-Servo
Max. Reel Size 10.5″
Tape Speeds 7 1⁄2 – 15 ips
Wow and Flutter 7 1⁄2 ips ± 0.025 % – 15 ips ± 0.02 % WRMS
Frequency Response 7.5 ips 30 – 18,000 Hz, ± 2 dB – 15 ips 30 – 22,000 Hz, ± 2 dB
Signal to Noise Ratio 68 dB at 15 ips
Total harmonic distortion 1 % at 15 ips
Dimensions 17.7 x 21.6 x 10″ – 450 x 550 x 255 mm
Weight 28 kg
In the last picture of the transport, there is a multi-voltage selector.
The 2 preamplifiers differ only in the fact that one of them has a headphone output.