DIATONE P-610

Commentary

Diatone's most representative 16 cm full-range speaker unit.
The P-610 was the first model, and after detailed model changes, it was sold almost as it was when it was released until 1996.

The P-610 is the first in the industry to pass the BTS standard established by NHK.

The initial model P-610 is equipped with a matching transformer and can be used with 2 impedance types of 6 Ω and 600 Ω.
For this reason, the mounting hole of the transformer remains in the P-610 series which was released later.
In addition, only impedance is different from P-610A/P-610B.

A pure iron is used for the magnetic circuit to increase effective flux density, and excellent damping and high efficiency are obtained for a 16 cm class.

The cone section adopts a matched resonance form designed by the direct attack method, and achieves broadband characteristics with a single cone by corrugation and free edge.

Model Rating

Method	BTS 6121 Passed Single Cone Type Full Range
Aperture	16cm
Impedance (at 400 Hz)	Normal : 6 Ω ± 0.6 Ω With attached output transformer : 600 Ω
Maximum allowable input	3W
Output sound pressure level	97dB/W (at 50 cm)
Playback frequency band	80 Hz ~ 10000 Hz ± 5 dB (Measured Data Attached)
Lowest resonance frequency	80 Hz ± 8 Hz
Harmonic distortion factor	5% or Less (Input 1W, 100 Hz or More)
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	Without transformer : 0.75 kg Total Weight : 1.2 kg (including transformer)