{"id":24215,"date":"2023-09-06T12:38:33","date_gmt":"2023-09-06T10:38:33","guid":{"rendered":"https:\/\/demdlx704as001.ad.harman.com\/?post_type=documentor-sections&p=24215"},"modified":"2023-09-06T14:20:55","modified_gmt":"2023-09-06T12:20:55","slug":"levelmax-2","status":"publish","type":"post","link":"https:\/\/audioworx.transfunnel.co\/old\/?p=24215","title":{"rendered":"LevelMAX"},"content":{"rendered":"

The LevelMAX has been designed to limit accurately to the specified voltage thresholds. The addition of a thermal limiter allows thresholds for the faster-acting RMS and peak limiters to be set higher, providing more output and maintaining dynamic range before the onset of limiting, while protecting the long-term integrity of the transducers.<\/p>\n

The LevelMAX Limiter features three types of limiting: Peak, RMS, and Transducer Thermal.<\/p>\n

LevelMAX also provides thresholds for amp thermal limiter control and breaker saver. These are meant to prevent amplifier failure and to avoid tripping circuit breakers, respectively. To use the features, the host processor monitors signals from the amplifier and a breaker saver object and feeds real-time adjustments to the dynamics.<\/p>\n

Use Cases: Smart amplifiers driving transducers.<\/em><\/p>\n

LevelMAX Properties<\/strong><\/p>\n

Not Available<\/p>\n

Mode<\/strong><\/p>\n

Not Available<\/p>\n

Additional Parameters<\/strong><\/p>\n\n\n\n\n
Name<\/strong><\/td>\nDescription<\/strong><\/td>\nType<\/strong><\/td>\nRange<\/strong><\/td>\nDefault<\/strong><\/td>\n<\/tr>\n
Linear Attack<\/td>\nWhen true, the peak limiter attack is linear over the lookahead time. Otherwise, the attack is logarithmic.<\/td>\nxUInt8<\/td>\ntrue; false<\/td>\ntrue<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tuning Parameters<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Name<\/strong><\/td>\nDescription<\/strong><\/td>\nOffset<\/strong><\/td>\nType<\/strong><\/td>\nUnit<\/strong><\/td>\nDefault<\/strong><\/td>\nRange<\/strong><\/td>\n<\/tr>\n
0dBFS Reference Voltage<\/td>\nThe reference voltage used for threshold comparison<\/td>\n0<\/td>\nfloat<\/td>\nV<\/td>\n209.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
Peak Limiter Voltage Threshold<\/td>\nThe peak level, in absolute voltage, which the limiter will allow from the amplifier. When the host is operating in Automatic mode, the Peak Threshold value is automatically determined from the defined RMS threshold and the low pass frequency defined in the crossover.<\/td>\n4<\/td>\nfloat<\/td>\nVpeak<\/td>\n100.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
TLC Peak Limiter Voltage Threshold<\/td>\nThermal limiter control threshold for the peak limiter. The host should monitor voltage from the amplifier and set the threshold in real-time to protect the amplifier.<\/td>\n8<\/td>\nfloat<\/td>\nVpeak<\/td>\n600.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
Peak Breaker Saver Voltage Threshold<\/td>\nBreaker Saver voltage threshold for the peak limiters. The host should monitor the Breaker Saver object and set the threshold in real-time to prevent tripping the breaker.<\/td>\n12<\/td>\nfloat<\/td>\nVpeak<\/td>\n600.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
Peak Limiter Release<\/td>\nThe release time of the peak limiter. The release time is defined as the time it takes the limiter to increase the output signal by 20dB.<\/td>\n16<\/td>\nfloat<\/td>\nsec\/20 dB<\/td>\n0.01<\/td>\n0.0001 to 10.0<\/td>\n<\/tr>\n
RMS Voltage Threshold<\/td>\nThe RMS level, in absolute voltage, which the limiter will allow from the amplifier. The RMS Threshold should be set to correspond to the short term (2 hour) power handling of the transducer or system.<\/td>\n20<\/td>\nfloat<\/td>\nVrms<\/td>\n100.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
TLC RMS Voltage Threshold<\/td>\nThermal limiter control threshold for the RMS limiter. The host should monitor voltage from the amplifier and set the threshold in real-time to protect the amplifier.<\/td>\n24<\/td>\nfloat<\/td>\nVrms<\/td>\n600.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
RMS Breaker Saver Voltage Threshold<\/td>\nBreaker Saver voltage threshold for the RMS limiters. The host should monitor the Breaker Saver object and set the threshold in real-time to prevent tripping the breaker.<\/td>\n28<\/td>\nfloat<\/td>\nVrms<\/td>\n600.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
RMS Limiter Release<\/td>\nThe release time of the RMS limiter. The release time is defined as the time it takes the limiter to increase the output signal by 20dB.<\/td>\n32<\/td>\nfloat<\/td>\nsec\/20dB<\/td>\n0.01<\/td>\n0.0001 to 10.0<\/td>\n<\/tr>\n
RMS Detector Time<\/td>\nThe averaging window length of the RMS detector<\/td>\n36<\/td>\nfloat<\/td>\nmsec<\/td>\n100.0<\/td>\n0.001 to 150.0<\/td>\n<\/tr>\n
Thermal Voltage Threshold<\/td>\nThermal Voltage Threshold<\/td>\n40<\/td>\nfloat<\/td>\nV<\/td>\n100.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
Thermal Time Constant<\/td>\n\n

The thermal response time is the amount of time the average RMS signal is above the thermal threshold voltage before limiting begins. Once the threshold has been exceeded for the amount of time defined by the thermal response time, the RMS threshold is lowered until the target thermal voltage has been reached. The thermal response time is not the time it takes to reach the target voltage.<\/p>\n

Thermal response time is transducer-dependent and should be based on the initial temperature rise of the transducer voice coil to protect it from thermal overload. If detailed transducer data is unavailable, the Thermal Response Time should be left at the default value of 10 sec.<\/td>\n

44<\/td>\nfloat<\/td>\nsec<\/td>\n10.0<\/td>\n1.0 to 600.0<\/td>\n<\/tr>\n
AutoCalc PI and Rms Attack<\/td>\nEnables automatic values for transducer thermal PI controller and RMS limiter attack time.<\/td>\n48<\/td>\nULong<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n
RMS Limiter Attack<\/td>\nThe attack time of the RMS limiter<\/td>\n52<\/td>\nfloat<\/td>\nsec\/20dB<\/td>\n1.0<\/td>\n0.00015 to 15.0<\/td>\n<\/tr>\n
Thermal Proportional K<\/td>\nThermal Proportional K coefficient<\/td>\n56<\/td>\nfloat<\/td>\n–<\/td>\n1.0<\/td>\n0.001 to 2.5<\/td>\n<\/tr>\n
Thermal Integral K<\/td>\nThermal Integral K coefficient<\/td>\n60<\/td>\nfloat<\/td>\n–<\/td>\n0.1<\/td>\n0.001 to 0.5<\/td>\n<\/tr>\n
Peak Limiter Enable<\/td>\nEnables the peak limiter. When disabled, the peak limiter still functions with a default threshold value and considers the TLC and Breaker Saver parameters.<\/td>\n64<\/td>\nULong<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n
RMS Limiter Enable<\/td>\nEnables the RMS limiter. When disabled, the RMS limiter still functions with a default threshold value and considers the TLC and Breaker Saver parameters.<\/td>\n68<\/td>\nULong<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n
Thermal Limiter Enable<\/td>\nEnables transducer thermal limiting. For thermal limiting to be enabled, the RMS limiter must also be enabled.<\/td>\n72<\/td>\nULong<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n
Amplifier Bridged<\/td>\nTells LevelMAX that bridged mode is enabled. LevelMAX will multiple the RMS, peak, and transducer thermal thresholds by 0.5 because stereo channels will be effectively summed.<\/td>\n76<\/td>\nULong<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n
Bypass<\/td>\nBypasses LevelMAX. However, the delay through the effect imposed by the lookahead should remain.<\/td>\n80<\/td>\nULong<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Control Parameters<\/strong><\/p>\n

Not available<\/p>\n

State Parameters<\/strong><\/p>\n

LevelMAX exposes meters via state memory.<\/p>\n\n\n\n\n\n\n\n\n
Name<\/strong><\/td>\nDescription<\/strong><\/td>\nOffset<\/strong><\/td>\nType<\/strong><\/td>\nUnit<\/strong><\/td>\nDefault<\/strong><\/td>\nRange<\/strong><\/td>\n<\/tr>\n
RMS Gain Reduction<\/strong><\/td>\nThe amount of gain reduction from the RMS limiter. This will include the gain reduction from the various RMS thresholds as well as the result of the transducer thermal adjustment.<\/td>\n0<\/td>\nfloat<\/td>\ndB<\/td>\n0.0<\/td>\n0.0 to 80.0<\/td>\n<\/tr>\n
Peak Gain Reduction<\/strong><\/td>\nThe amount of gain reduction from the peak limiter.<\/td>\n4<\/td>\nfloat<\/td>\ndB<\/td>\n0.0<\/td>\n0.0 to 80.0<\/td>\n<\/tr>\n
Total Gain Reduction<\/strong><\/td>\nThe total gain reduction.<\/td>\n8<\/td>\nfloat<\/td>\ndB<\/td>\n0.0<\/td>\n0.0 to 80.0<\/td>\n<\/tr>\n
Thermal Limiting Adjust Amount<\/strong><\/td>\nThe transducer thermal adjustment fed back to the RMS limiter.<\/td>\n12<\/td>\nfloat<\/td>\ndB<\/td>\n0.0<\/td>\n-120.0 to 0.0<\/td>\n<\/tr>\n
Transducer Thermal Limiting<\/strong><\/td>\n1 if Thermal Limiting Adjust Amount is less than -0.75 dB, otherwise 0.<\/td>\n16<\/td>\nfloat<\/td>\nflag<\/td>\n0<\/td>\n0; 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Native Panel<\/strong><\/p>\n

Not available<\/p>\n","protected":false},"excerpt":{"rendered":"

The LevelMAX has been designed to limit accurately to the specified voltage thresholds. The addition of a thermal limiter allows thresholds for the faster-acting RMS and peak limiters to be set higher, providing more output and maintaining dynamic range before the onset of limiting, while protecting the long-term integrity of the transducers. The LevelMAX Limiter […]<\/p>\n","protected":false},"author":107,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","footnotes":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"off","ocean_gallery_id":[]},"categories":[1],"tags":[],"coauthors":[292],"_links":{"self":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/24215"}],"collection":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/users\/107"}],"replies":[{"embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=24215"}],"version-history":[{"count":5,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/24215\/revisions"}],"predecessor-version":[{"id":24261,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/24215\/revisions\/24261"}],"wp:attachment":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=24215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24215"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcoauthors&post=24215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}