JBL 5234A Specifications

JBL 5234A
¥ 140,000 (around 1983)

Commentary

A dual-channel electric crossover network developed for studio monitors and sound reinforcement.

The 5234A allows two way (stereo) or three way (mono) multi-amplifiers.

Equipped with a continuously variable high-level control.

The crossover frequency is determined by inserting a filter board (sold separately). There are 8 types of 12dB/oct filter boards and 3 types of 18dB/oct filter boards. For other frequencies, a blank board corresponding to the cutoff characteristics is used.
For blank circuit boards, any frequency can be set by installing capacitors or resistors. The recommended parts to be used are a Mylar capacitor with less than 5% error and a resistor with 1/4 watts and less than 5% error.

Model Rating

Type

Channel divider

Gain

0 dB (Passport)

Crossover frequency

Plug-in Module Type (Sold Separately)
Crossover point -3dB + / - 10%

Damping property

12dB/oct, 18dB/oct (determined by plug-in module)

Total harmonic distortion factor

0.5% (20 Hz to 20 kHz, at rated output, listed in catalog)
0.01% (+ 18 dBv,> 100k Ω load, as stated in technical manual)

Frequency characteristic

20 Hz to 20 kHz ± 0.5 dB

Signal-to-noise ratio

90 dB or More (20 Hz to 20 kHz, Band Pass Filter Used)

Channel separation

70 dB or More (20 Hz to 20 kHz)

Rated output

6.2 V (+ 18 dBv, 0 dBv = 0.775 Vrms (1 mW, 600 Ω load)

Input impedance

50k Ω balance

Load impedance

600 Ω or more

Output impedance

47 Ω (Catalog Description)
50 Ω (unbalanced, described in technical manual)

Input

Screw type terminal
6.3 mm horn jack, 3-circuit balanced input

Output

Screw type terminal
6.3 mm Horn Jack, 2 Circuit Unbalanced Output

Pwer

100 ~ 120 VAC / 200 ~ 240 V, 50Hz/60Hz

Power consumption

External dimensions

Width 483x Height 44x Depth 194 (209) mm (1 EIA standard rack size)

Weight

1.8kg

Sold Separately

Dividing network

52-5120(¥6,000)
52-5121(¥8,000)
52-5122(¥8,000)
52-5123(¥8,000)
52-5124(¥8,000)
52-5125(¥8,000)
52-5127(¥8,000)
52-5130(¥8,000)
52-5140(¥8,000)
51-5130(¥9,000)
51-5132(¥9,000)
51-5133(¥9,000)
51-5138 (price unknown)
51-5145(¥11,000)

Crossover filter substrate

Model number	Crossover frequency
52-5121	250 Hz, 12dB/oct.
52-5122	500 Hz, 12dB/oct.
52-5123	800 Hz, 12dB/oct.
52-5124	1.2 kHz, 12dB/oct.
52-5125	5 kHz, 12dB/oct.
52-5127	7 kHz, 12dB/oct.
52-5130	1 kHz, 12dB/oct.
52-5140	Studio Monitor 4343 only, 300 Hz, 12dB/oct.
52-5120	Blank filter substrate, 12dB/oct.
	Frequency	Condenser	Resistance
	50Hz 70Hz 100Hz 200Hz 300Hz 400Hz 600Hz 700Hz 900Hz 1kHz 1.1kHz 1.5kHz 2kHz 2.5kHz	0.22 μ F 0.22 μ F 0.22 μ F 0.12 μ F 0.082 μ F 0.055 μ F 0.039 μ F 0.032 μ F 0.027 μ F 0.022 μ F 0.022 μ F 0.012 μ F 0.012 μ F 0.0082 μ F	10k Ω 7.5k Ω 4.7k Ω 4.7k Ω 4.7k Ω 5.1k Ω 4.7k Ω 5.1k Ω 4.7k Ω 5.1k Ω 4.7k Ω 6.2k Ω 4.7k Ω 5.6k Ω
51-5130	Blank filter substrate, 18dB/oct
51-5132	500 Hz, 18dB/oct.
51-5133	800 Hz, 18dB/oct.
51-5138	80 Hz, 18dB/oct.
51-5145	290 Hz, 18dB/oct.