The PreSonus Eris E3.5 is a pair of 3.5" 2-way 25W nearfield monitors designed to provide a compact sonic reference system for musicians, producers, and audio engineers in home setups, project studios, and commercial facilities. Each monitor produces a frequency response of 80 Hz to 20 kHz via a 3.5" Kevlar woofer and a 1" silk dome tweeter powered by a 25W class AB amplifier. The monitors can handle 100 dB maximum peak SPL. A rear bass-reflex port provides enhanced low-frequency range.
For inputs, the monitor system accepts balanced 1/4" TRS, unbalanced 3.5mm, and unbalanced RCA inputs. An integrated 2-band EQ allows you to fine tune the monitors to your listening preference. The EQ controls include ±6 dB gain at 100 Hz and ±6 dB at 10 kHz. A front-panel 3.5mm stereo mini-jack is provided for easy headphone monitoring.
Each cabinet uses resonance-suppressing internal bracing to optimize the sound output and the amplifiers include RF interference, output-current limiting, over-temperature, transient, and subsonic protection circuits.
Components and Construction
	
3.5" Kevlar low-frequency transducer
	
1" ultra-low-mass, silk-dome, high-frequency transducer
	
Rear-firing acoustic port for enhanced bass-frequency reproduction
	
Optimized, resonance-suppressing internal bracing
User Controls
	
High-frequency shelving EQ at 10 kHz
	
Low-frequency shelving EQ at 100 Hz
	
Front-panel volume control for speakers and headphone amplifier
I/O
	
Balanced 1/4" TRS, unbalanced 3.5mm stereo, and unbalanced RCA inputs
	
Integrated stereo headphone amplifier with front-panel 3.5mm output
Power and Safety
	
50W (25W per side) Class AB biamplification
	
RF interference, output current limiting, over-temperature, transient, and subsonic protection
	
Amplifier “soft start” feature eliminates popping on power-up
	
Internal power supply with IEC connector
	
Power switch with on/off LED
	
		
			
Speakers
		
		
			
LF Driver
			
3.5" / 89 mm Kevlar speaker
		
		
			
HF Driver
			
1" / 25 mm silk dome tweeter
		
	
	
		
			
I/O
		
		
			
Inputs
			
2 x balanced 1/4" TRS
			2 x unbalanced RCA (L/R pair)
			1 x 1/8" (3.5 mm) TRS stereo mini-jack
		
		
			
Outputs
			
1 x 1/8" (3.5 mm) TRS stereo mini-jack
		
	
	
		
			
Performance
		
		
			
Frequency Response
			
80 Hz to 20 kHz
		
		
			
Crossover Frequency
			
2.8 kHz
		
		
			
Amplifier Power
			
25 W per speaker
		
		
			
Maximum SPL
			
At 1 m: 100 dB (peak)
		
		
			
Input Impedance
			
10 kOhms
		
	
	
		
			
User Controls
		
		
			
Volume Management
			
A-type taper
		
		
			
Mid Frequency Driver
			
Control: variable (-6 to +6 dB, center @ 100 Hz)
		
		
			
High Frequency Driver
			
Control: variable (-6 to +6 dB, center @ 10 kHz)
		
		
			
Protection
			
RF interference
			Output-current limiting
			Over-temperature
			Turn on/off transient
			Subsonic filter
			External mains fuse
		
	
	
		
			
Power
		
		
			
Power Requirements
			
100 to 120 VAC at 50/60 Hz, or 220 to 240 VAC at 50/60 Hz
		
	
	
		
			
Physical
		
		
			
Cabinet
			
Vinyl-laminated MDF
		
		
			
Dimensions (W x D x H)
			
5.6 x 6.4 x 8.3" / 141 x 162 x 210 mm
		
		
			
Weight
			
Per pair: 6.4 lb / 2.9 kg
		
	
	
		
			
Packaging Info
		
		
			
Package Weight
			
8.5 lb
		
		
			
Box Dimensions (LxWxH)
			
15.2 x 10.8 x 8.4"