JAMO 250 Скачать руководство пользователя страница 7

In/Outputs 

All the subwoofers features speaker level inputs if there is lack of a line level/LFE 
level output on the amplifier/receiver.  
All subwoofers also have both left and right line level input in case of stereo 
sources and a loop through capability, i.e case the signal needs to be routed 
through to a second subwoofer. 
The SUB 650 also features a 12V trigger, allowing it to be turned on 
automatically together with the receiver/controller if the receiver/controller has 
the presence of such an output.  
 

Drivers 

The drivers used throughout the sub series are constructed with heavy magnet 
systems , long VCs and very stiff paper membranes. 
This enables a very fast attack and a high degree of control.  

Sub 250 

For the SUB 250 the woofer is an 8” driver with an  
Ø 38mm 4-layer voice coil with an X-max at +/-10mm allowing for high 
excursions. The heavy magnet system features a vented pole piece in order to 
avoid over/under pressure behind the dust cap (mechanical damping) when 
the cone is moving. 

Sub 450 & 550 

For the SUB 450 & 550 a 10” driver is chosen. 
The driver features an Ø 38mm 4-layer voice coil with an X-max at +/-15mm 
allowing for high excursions. The heavy magnet system features a vented pole 
piece in order to avoid over/under pressure behind the dust cap (mechanical 
damping) when the cone is moving. 

Sub 650 

For the SUB 650 a 12” driver is chosen . The driver features an Ø 50mm, 4-layer 
voice coil with an X-max at +/- 18mm allowing for high excursions. The heavy 
magnet system features a vented pole piece in order to avoid over/under 
pressure behind the dust cap (mechanical damping) when the cone is moving. 
 

Cabinets 

All subwoofer cabinets are made of heavy MDF board, a solid and resonance 
dead base for the drivers to work in. 
However, the 

S

lotted 

B

ass reflex 

P

ort is probably the most remarkable feature 

of the SUB 250, 450 and 550 cabinets. 
The slotted port is an integral part of the construction, which braces the 
surfaces, making the overall construction extremely rigid. 
The 

S

lotted 

B

ass reflex 

P

ort is very long allowing a low tuning frequency 

together with a large radiating area compared to a conventional round port, 
giving a high efficiency and low distortion. 

Содержание 250

Страница 1: ...Technical Description Jamo SUB 250 300 550 650...

Страница 2: ...evels SPL without compromising the sound quality It is quite easy to make a subwoofer play loud but it is a challenge at the same time to maintain precision and musicality This turned out to require d...

Страница 3: ...ted construction is used here as in the SUB 250 But with more cabinet volume allowing for deeper tuning more power and a 10 driver this subwoofer is capable of reaching down to 28 Hz 6dB Still with mu...

Страница 4: ...is no bass reflex port to contribute to a high SPL it delivers 110 dB sound pressure level The advantages of a closed cabinet is absolutely absence of port noise and an even better timing resulting in...

Страница 5: ...is based on a continually variable supply voltage which tends to zero when there is no input signal and reaches its highest level when the amplification requires power This supply voltage is continuou...

Страница 6: ...ification depends on the actual room and where you are positioned normally it increases the closer you get to a wall which also means that the problem gets worse the smaller the room This can result i...

Страница 7: ...ne is moving Sub 450 550 For the SUB 450 550 a 10 driver is chosen The driver features an 38mm 4 layer voice coil with an X max at 15mm allowing for high excursions The heavy magnet system features a...

Страница 8: ...In normal setup the port is radiating towards the rear wall giving an even higher efficiency at very low frequencies...

Страница 9: ...250 300 550 650 Frequency range Hz 30 150 3dB 28 150 3dB 26 150 3dB 24 150 3dB Impedance Ohm 22 kOhm 22 kOhm 22 kOhm 22 kOhm 12 V trigger No no no yes Phase Yes variable Yes variable Yes variable Yes...

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