It's been maintained! The network used for A5. The sound loss is very good, probably because of the crossover 500Hz large capacitor. There is an overhang and the goodness of sharpness is impeccable! It is a very attractive sound not only for Altec users but also for 500Hz networks. * The age is slightly different on the left and right. Appearance has aging small scratches, dullness, etc. (Satoshi Yonejima)
Maintenance Information: 2022.4.1 Maintained (Removed wire scraps soldered to terminals. Re-fix the unfixation of the large coil inside the housing with silicone sealant, and take measures to hold the sponge with scissors and the top plate. ATT (threaded) contact cleaning, rust removal of screws and bridge plates Frequency characteristic measurement check (~ 42 kHz) was performed and the original capacitor was continued to be used for good results. (Check input/output waveform and balance, check sound output)
Accessories: No accessories
Main specifications: Crossover 500Hz HF gain 4-stage switching (short plate) W203 × H270 × D115 mm
The price has been reduced! 2020/7/19 Sales price 75,000 yen Maintained! ALTEC's crossover frequency variable network. Grain and sound cuts are also a good impression. This network makes it easy to change horns and drivers. The appearance has dusts and scratches. The color of the printing on the top plate is different on the left and right. Serial 336145/336146 (Makoto Kono)
Maintenance information: 2020.7.19 Maintained (rear terminal screw and bridge rust removal (pickling) processing Front terminal orientation Corrected and increased deadline switching SW contact cleaning ATT disassemble contact Cleaning and contact grease application Frequency characteristic measurement check (~42 kHz) and continue using the original capacitor for good results input/output waveform and balance check sound output check)
Accessories: None
Main specifications: Crossover 500 Hz, 800 Hz, 1200 Hz can be switched with a jumper Banana plug input compatible W191 × H110 × D350 1.8 kg/book
* Currently sold products. An ARACRAFT network that custom JBL 3115. Detailed specs are unknown, but the crossover seems to be 500Hz. (Itsuro Mizushima)
Maintenance Information: 2021.5.17 Operation confirmed
Accessories: None
Main specifications: W120 × H155 × D183 mm 3.8 kg
This is a rare 3-way network. The cross will be 500/7,000 Hz. It is possible to build a 3-way system with this one unit. Level control is also possible, and it's easy to use. The exterior has dullness and oxidation. Serial 512013/512014 (Tamura Eiji)
Maintenance information: 2023.12.9 operation confirmed
Accessories: instruction manual
Main specifications: cross 500/7,000 Hz -5 to -15 dB W120 x H153 x D175 mm weight 2.2 kg/unit
This is a rare 3-way network. The cross will be 500/7,000 Hz. It is possible to build a 3-way system with this one unit. Level control is also possible, and it's easy to use. The appearance is dull and oxidized. Serial 512013/512014 (Tamura Eiji)
Maintenance information: 2023.11.8 operation confirmed
Accessories: instructions
Main specifications: cross 500/7,000 Hz -5 to -15 dB W120 x H153 x D175 mm weight 2.2 kg/unit
A model made as a network for the company Tweeter 1710 and speakers SP-8716. The surroundings are covered with carbon, and the inside uses a super permalloy core. Improvement of lingering and natural sound reproduction can be obtained by improving network filter characteristics and auditory distortion. The appearance has abrasions and scratches. (Eiji Tamura)
Maintenance information: 2022.1.21 operation confirmed (ATT is also not available)
Accessories: No accessories
Main specifications: 8Ω/16Ω switching SW ATT5 stage change switching W270 ✕ H110 ✕ D385mm Weight 12.2kg
Bellwood's 2-way network crossover is 7 kHz. A FOSTEX attenuator is attached to the high frequency section, so sound pressure can be adjusted. Recommended for those who want to add Twitter to the full range unit. The exterior is clear and there is a feeling of use (Kobayashi Hitoshi)
Maintenance Information: 2022.11.8 Operation confirmed
Accessories: none
Main specifications: Crossover frequency: 7kHz 8Ω attenuation: 12dB/oct W170 × H100 × D140 mm 0.88 kg
Coral professional 3-way network Although it is a standard product, it is a gem that you don't see much. (Fujisawa Yukishi)
Accessories: original box, instruction manual
Main specifications: Crossover 300Hz/3500Hz impedance 8/16Ω compatible (using jumper wire) withstand input 30W W115 × H10 × XD80mm 1.3kg