Front Panel Information | Crate Amplifiers SPA100 guide

SPA100 1 / 2 - R a c k P o w e r A m p l i f i e r

Front Panel Information:

Power

Off

Power Signal Limit Protect

1:POWER SWITCH: This switch applies AC power to the amplifier. The amp is on when the top of the switch is depressed, off when the bottom of the switch is depressed. The Power LED indicator (#3) illuminates when the ampli- fier is on.

2:LEVEL CONTROL: This rotary potentiometer controls the level or gain of the amplifier, with the fully-clockwise position providing a sensitivity of +2dBv. Normal calibra- tion of the SPA100 to a mixer would cause the Peak LED to flash at the same time that the mixer’s VU meters indi- cate full output.

3:POWER LED: This LED illuminates when AC power is applied by means of the Power switch (#1). If the LED fails to illuminate, check the AC outlet or the fuse on the rear panel (#13).

4:SIGNAL LED: This LED illuminates when a signal is detected at the amplifier’s output terminals. The level of the signal must be at least 1% of the amplifier’s full rated output to cause the LED illuminate.

5:LIMIT LED: The SPA100 employs an internal limit cir- cuit to alert the user if the amplifier is approaching clip- ping. The Limit LED illuminates whenever the input signal attempts to overdrive the amplifier. (Not only does clip- ping produce harsh sounding distortion, it is also capable of damaging speaker components – particularly high fre-

quency drivers.) Periodic flashing of the Limit LED indi- cates operation at or near full output. This is normal. Steady illumination of the LED indicates constant opera- tion of the Limiter, with the possibility that the input sig- nal should be reduced by means of the Level control (#2).

6:PROTECT LED: This LED illuminates whenever the inter- nal protection circuit is activated. The protection relay is activated for a short period upon initial turn-on and at turn- off to prevent transient “spikes” from being reproduced through your speakers. A fault condition is also indicated in the event of an overtemperature status, or if DC voltages are present at the output. During thermal protection, the output is shut down until the temperature returns to a safe operating level. In the event of DC voltage on the output, the output will be internally disconnected. The circuitry associated with the LED indicator provides valuable pro- tection for both the amplifier and your speakers.

7:FRONT PANEL EXHAUST VENT: The SPA100 employs a variable-speed internal cooling fan to draw air through the unit to keep it running cool even under extreme operating conditions. Air is drawn in through the unit’s rear and side intake vents and is forced out through the front panel exhaust vent. Keep these vents clear and free from obstruc- tion at all times to insure proper cooling.

SPA100 specifications

The Crate Amplifiers SPA100 is a versatile and powerful amplifier designed for musicians seeking rich tones and robust performance across various musical genres. Renowned for its reliability and sound quality, the SPA100 has become a staple for guitarists and bass players alike.

One of the standout features of the SPA100 is its impressive power output, delivering 100 watts through its two channels. This ensures an ample amount of volume for live performances, making it suitable for anything from intimate gigs to larger venues. The two channels allow musicians to customize their sound, with one channel typically dedicated to clean tones and the other for overdriven or distorted sounds.

In terms of sound shaping capabilities, the SPA100 is equipped with a 3-band EQ for both channels. This equalization system gives players the ability to sculpt their tones precisely, adjusting the bass, mid, and treble frequencies to fit their individual styles or the demands of specific musical pieces. The built-in reverb effect adds an extra layer of depth to the sound, making it perfect for creating atmospheric performances.

The SPA100 features a solid-state design, which contributes to its durability and consistent performance. Solid-state amplifiers are known for their ability to produce high headroom, making them less prone to distortion at higher volumes—a critical advantage for playing live. Additionally, the amp is designed with high-quality components, ensuring reliability on the road.

Another significant aspect of the SPA100 is its lightweight nature, making it easy for musicians to transport. Despite its power, the design focuses on portability, a key consideration for today's gigging musicians. This combination of power and portability means that the SPA100 can deliver sophisticated sound while being easy to manage.

For connectivity, the SPA100 includes multiple input options and effects loops, allowing musicians to integrate various pedals and effects into their setup seamlessly. This flexibility enhances the amplifier’s usability in both studio and live scenarios, accommodating a wide range of instruments and effects.

In summary, the Crate Amplifiers SPA100 is an exemplary amplifier that marries sound quality with user-friendly features. Its robust power, comprehensive EQ, solid-state reliability, and portability make it a preferred choice for musicians on the go. Whether performing live or rehearsing, the SPA100 stands out as a reliable and versatile piece of gear that caters to the diverse needs of contemporary musicians.