DIATONE P-610A(AT/AJ)/P-610B
P-610A : ¥ 1,700 (1 piece, around 1970)
P-610AT : ¥ 1,950 (1 piece, around 1970)
P-610AJ : ¥ 1,500 (1 piece, around 1970)
P-610B : ¥ 1,500 (1 piece, around 1970)
Commentary
This unit has undergone a model change of the P-610.
There were 3 kinds of patterns such as A, AT and AJ for P-610A in the initial stage.
A is B. T. S standard product without transformer and 16 Ω, P-610AT is B. T. S standard product and 600 Ω (16 Ω without transformer), P-610AJ is JIS standard product and 16 Ω.
It seems that there was actually no difference in quality between the B. T. S standard product and the JIS standard product, and it seems that the B. T. S standard product was the one that was picked out at random from the JIS standard product and actually measured it and attached the data.
In addition, P-610B is a JIS standard product with 8 Ω impedance.
Model Rating
| Method | Single Cone Type Full Range |
| Aperture | 16cm |
| Impedance | P-610A : 16 Ω P-610AT : 600 Ω (Without Transformer : 16 Ω) P-610AJ : 16 Ω P-610B : 8 Ω |
| Max Input | 3W |
| Output sound pressure level | 97dB/W (at 50 cm) |
| Playback frequency band | 80 Hz to 13000 Hz |
| Lowest resonance frequency | 80Hz |
| Magnetic flux density | 10000gauss |
| Effective vibration radius | 6.5cm |
| Equivalent mass of the vibration system | 6.5gr |
| Equivalent Q of the vibration system0 | 0.8 |
| Voice Coil Diameter | 1.92 cm φ |
| Total flux | 8.5x104maxwells |
| Permanent magnet | 30 φ x25 |
| Baffle opening diameter | 135mm |
| External dimensions | Width 173x Depth 94 mm |
| Weight | 0.75kg |